feat: implement modular workflow structure for multi-node blockchain

BREAKING CHANGE: Split 64KB monolithic workflow into 6 focused modules

New Modular Structure:
- MULTI_NODE_MASTER_INDEX.md: Central navigation hub for all modules
- multi-node-blockchain-setup-core.md: Essential setup steps and basic configuration
- multi-node-blockchain-operations.md: Daily operations, monitoring, troubleshooting
- multi-node-blockchain-advanced.md: Smart contracts, security testing, performance optimization
- multi-node-blockchain-production.md: Production deployment, security hardening, scaling
- multi-node-blockchain-marketplace.md: Marketplace testing, GPU provider testing, AI operations
- multi-node-blockchain-reference.md: Configuration reference, verification commands, best practices

Benefits Achieved:
✅ Improved Maintainability: Each module focuses on specific functionality
✅ Enhanced Usability: Users can load only needed modules
✅ Better Documentation: Each module has focused troubleshooting guides
✅ Clear Dependencies: Explicit module relationships and learning paths
✅ Better Searchability: Find relevant information faster

Migration Features:
- Original 64KB workflow (2,098 lines) deprecated but preserved
- Clear migration guide with section mapping
- Master index provides navigation by task, role, and complexity
- Cross-references between all modules
- Quick start commands for each module

Learning Paths:
- New Users: Core → Operations → Reference
- System Administrators: Core → Operations → Advanced → Reference
- Production Engineers: Core → Operations → Advanced → Production → Reference
- AI Engineers: Core → Operations → Advanced → Marketplace → Reference

Technical Improvements:
- Reduced file complexity from 2,098 lines to ~300 lines per module
- Module-specific troubleshooting tables and command references
- Focused prerequisite chains and dependency management
- Production-ready configurations and security hardening
- Comprehensive AI operations and marketplace testing

Files:
- New: 6 focused workflow modules + master index
- Updated: Original monolithic workflow (deprecated with migration guide)
- Preserved: All existing functionality in modular format
- Added: Cross-references, learning paths, and quick navigation

.windsurf/workflows/ollama-gpu-test.md

@@ -0,0 +1,136 @@
+---
+description: Complete Ollama GPU provider test workflow from client submission to blockchain recording
+---
+
+# Ollama GPU Provider Test Workflow
+
+This workflow executes the complete end-to-end test for Ollama GPU inference jobs, including payment processing and blockchain transaction recording.
+
+## Prerequisites
+
+// turbo
+- Ensure all services are running: coordinator, GPU miner, Ollama, blockchain node
+- Verify home directory wallets are configured
+- Install the enhanced CLI with multi-wallet support
+
+## Steps
+
+### 1. Environment Check
+```bash
+# Check service health
+./scripts/aitbc-cli.sh health
+curl -s http://localhost:11434/api/tags
+systemctl is-active aitbc-host-gpu-miner.service
+
+# Verify CLI installation
+aitbc --help
+aitbc wallet --help
+```
+
+### 2. Setup Test Wallets
+```bash
+# Create test wallets if needed
+aitbc wallet create test-client --type simple
+aitbc wallet create test-miner --type simple
+
+# Switch to test client wallet
+aitbc wallet switch test-client
+aitbc wallet info
+```
+
+### 3. Run Complete Test
+```bash
+# Execute the full workflow test
+cd /home/oib/windsurf/aitbc/home
+python3 test_ollama_blockchain.py
+```
+
+### 4. Verify Results
+The test will display:
+- Initial wallet balances
+- Job submission and ID
+- Real-time job progress
+- Inference result from Ollama
+- Receipt details with pricing
+- Payment confirmation
+- Final wallet balances
+- Blockchain transaction status
+
+### 5. Manual Verification (Optional)
+```bash
+# Check recent receipts using CLI
+aitbc marketplace receipts list --limit 3
+
+# Or via API
+curl -H "X-Api-Key: client_dev_key_1" \
+  http://127.0.0.1:18000/v1/explorer/receipts?limit=3
+
+# Verify blockchain transaction
+curl -s http://aitbc.keisanki.net/rpc/transactions | \
+  python3 -c "import sys, json; data=json.load(sys.stdin); \
+    [print(f\"TX: {t['tx_hash']} - Block: {t['block_height']}\") \
+    for t in data.get('transactions', [])[-5:]]"
+```
+
+## Expected Output
+
+```
+🚀 Ollama GPU Provider Test with Home Directory Users
+============================================================
+
+💰 Initial Wallet Balances:
+----------------------------------------
+   Client: 9365.0 AITBC
+   Miner:  1525.0 AITBC
+
+📤 Submitting Inference Job:
+----------------------------------------
+   Prompt: What is the capital of France?
+   Model: llama3.2:latest
+✅ Job submitted: <job_id>
+
+⏳ Monitoring Job Progress:
+----------------------------------------
+   State: QUEUED
+   State: RUNNING
+   State: COMPLETED
+
+📊 Job Result:
+----------------------------------------
+   Output: The capital of France is Paris.
+
+🧾 Receipt Information:
+   Receipt ID: <receipt_id>
+   Provider: miner_dev_key_1
+   Units: <gpu_seconds> gpu_seconds
+   Unit Price: 0.02 AITBC
+   Total Price: <price> AITBC
+
+⛓️  Checking Blockchain:
+----------------------------------------
+✅ Transaction found on blockchain!
+   TX Hash: <tx_hash>
+   Block: <block_height>
+
+💰 Final Wallet Balances:
+----------------------------------------
+   Client: <new_balance> AITBC
+   Miner:  <new_balance> AITBC
+
+✅ Test completed successfully!
+```
+
+## Troubleshooting
+
+If the test fails:
+1. Check GPU miner service status
+2. Verify Ollama is running
+3. Ensure coordinator API is accessible
+4. Check wallet configurations
+5. Verify blockchain node connectivity
+6. Ensure CLI is properly installed with `pip install -e .`
+
+## Related Skills
+
+- ollama-gpu-provider - Detailed test documentation
+- blockchain-operations - Blockchain node management